Multi-homing Deployment Considerations for Distributed-Denial-of-Service Open Threat Signaling (DOTS)
draft-ietf-dots-multihoming-05
Network Working Group M. Boucadair
Internet-Draft Orange
Intended status: Standards Track T. Reddy
Expires: May 27, 2021 McAfee
W. Pan
Huawei Technologies
November 23, 2020
Multi-homing Deployment Considerations for Distributed-Denial-of-Service
Open Threat Signaling (DOTS)
draft-ietf-dots-multihoming-05
Abstract
This document discusses multi-homing considerations for Distributed-
Denial-of-Service Open Threat Signaling (DOTS). The goal is to
provide some guidance for DOTS clients/gateways when multihomed.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 4
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Multi-Homing Scenarios . . . . . . . . . . . . . . . . . . . 4
4.1. Residential Single CPE . . . . . . . . . . . . . . . . . 5
4.2. Multi-Homed Enterprise: Single CPE, Multiple Upstream
ISPs . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.3. Multi-homed Enterprise: Multiple CPEs, Multiple Upstream
ISPs . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.4. Multi-homed Enterprise with the Same ISP . . . . . . . . 7
5. DOTS Multi-homing Deployment Considerations . . . . . . . . . 7
5.1. Residential CPE . . . . . . . . . . . . . . . . . . . . . 8
5.2. Multi-Homed Enterprise: Single CPE, Multiple Upstream
ISPs . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.3. Multi-Homed Enterprise: Multiple CPEs, Multiple Upstream
ISPs . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.4. Multi-Homed Enterprise: Single ISP . . . . . . . . . . . 12
6. Security Considerations . . . . . . . . . . . . . . . . . . . 13
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 13
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
9.1. Normative References . . . . . . . . . . . . . . . . . . 13
9.2. Informative References . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction
In many deployments, it may not be possible for a network to
determine the cause of a distributed Denial-of-Service (DoS) attack
[RFC4732]. Rather, the network may just realize that some resources
seem to be under attack. To improve such situation, the IETF is
specifying the DDoS Open Threat Signaling (DOTS)
[RFC8811]architecture, where a DOTS client can inform a DOTS server
that the network is under a potential attack and that appropriate
mitigation actions are required. Indeed, because the lack of a
common method to coordinate a real-time response among involved
actors and network domains jeopardizes the efficiency of DDoS attack
mitigation actions, the DOTS protocol is meant to carry requests for
DDoS attack mitigation, thereby reducing the impact of an attack and
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